Fetal Development Number Heart is formed and begins to pump. Bone marrow is only site of red blood cell production. Heartbeat can be heard with a stethoscope. Yolk sac produces the blood cells.

Q: Describe the positive feedback that is used during parturition. Make sure to include both hormones i...

A: Parturition refers to the process of giving birth to the child. It is a physiological process that i...

Q: Explain the roles of visual pigments.

A: The photoreceptive molecules found in the eye's retina region that are responsible for absorbing the...

Q: From what embryonic structures do most components ofthe cranial and spinal nerves form?

A: Cranial nerves emerge immediately from the brain comprising the brainstem. The spinal nerves origina...

Q: Discuss the processes of B cell sensitization, activation, and differentiation, describe the structu...

A: B - CELL SENSITIZATION : when a B cell encounters the antigen that binds to its receptor , the antig...

Q: The cells in a hair follicle that are responsible for forming hairare thea. papillary cells.b. matri...

A: Introduction: Skin appendages develop from the epidermis' down growth during human development. Duri...

Q: Why veins are called capacitance vesselsand how this relates to the structural difference between ve...

A: Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the bod...

Q: Define apex

A: The location of anything is called its position.

Q: Describe the roles water and oxygen play in the human body.

A: The human body is comprised of cells and tissues that formed different body structures. The body sys...

Q: Holly takes night classes at the local community college. Afterher lecture, she walks alone to her c...

A: The fight or flight response can be described as a mechanism generated by the human nervous system w...

Q: What do the ventricles contain, and why?

A: The ventricular system is crucial for the natural functioning of the central nervous system. It insu...

Q: Describe the age-related changes in tissues withabundant collagen and elastic fibers.

A: Tissues are groups of cells that have a comparable structure and act together to perform a particula...

Q: Why is a person with type O blood considered a universaldonor?

A: ABO blood group system involves two antigens and two antibodies that are found in the human blood. T...

Q: How are the gray matter and white matter arranged in thecerebellum? What is the arbor vitae?

A: The cerebellum is one of the major parts of the brain that is located in the hindbrain. It is respon...

Q: Explain the physiology of the olfactory receptors for smell. (short and simple)

A: Sense of smell: The olfactory receptors respond to chemicals that are dissolved in liquids. The che...

Q: How does the myelin sheath differ between the CNS andthe PNS?

A: Nervous system is an important system which helps in maintaining the homeostasis of the human body. ...

Q: Name the valves that separate the atriafrom the ventricles. What are the functionsof the papillary m...

A: The heart is the epicenter of the cardiovascular system and helps pump oxygenated blood to the rest ...

Q: Why are pregnant women given calcium supplements and encouraged to drink milk even though their skel...

A: Pregnancy is referred to as the period in which female mammal carries a baby that develops inside it...

Q: Describe how the cyclic increase and decrease in FSHand LH is produced.

A: The female reproductive system consists of internal organs and external genital structures. The inte...

Q: Name the six levels of organization of the body anddescribe the major characteristics of each level.

A: There are diverse kinds of organisms found on our planet, earth. They ranging from unicellular to mu...

Q: Abduction and adduction always refer to movements of the: (a) axial skeleton. (b) appendicular skele...

A: Introduction: At the time of the clinical process, like doing any physical examination, understandin...

Q: The gamma globulin of human blood serum exists in two forms, Gm(a+) and Gm(a-), specified respective...

A: The Hardy-Weinberg equilibrium is a rule stating that the hereditary variety in a population will st...

Q: Select the letter of the choice that best completes the statement. Ovulation usually occursa. the da...

A: Ovulation is the discharge of an egg from one of a woman's ovaries. After the egg discharged, it tou...

Q: Concerning the breasts,a. lactiferous ducts open on the areola.b. each lactiferous duct supplies an ...

A: The breast is the tissue overlying the chest (pectoral) muscles. Women's breasts are made of special...

Q: What are allergic reactions and autoimmune diseases?

A: “In autoimmunity, there is a different type of T-cell involved than in allergies. In an autoimmune r...

Q: Acne os disorder that involves the? A. Melanocytes B. Sudoriferous C. Sebaceous D. Hair follicles ...

A: Skin is the largest organ of the body where it covers the body of the animal and play a major role i...

Q: Smooth muscle has some unique properties, such as low energy usage, and the ability to maintain cont...

A: Smooth muscle is one of the involuntary and non-striated types of muscle found in the human body. It...

Q: Explain the physical, neural, and vascular connectionsbetween the hypothalamus and the pituitary gla...

A: The pituitary gland is a part of your endocrine system. Its main function is to secrete hormones int...

Q: What is the blind spot? What are the fovea centralis andmacula?

A: Introduction: The eyes are the sensory organs enabling vision. They are the paired structures respon...

Q: How does the medullary cavity enlarge during growth in thickness?

A: Intramembraneous ossification and endochondral ossification contribute to the bone tissue's formatio...

Q: Distinguish between extrinsic and intrinsic handmuscles.

A: The terminal region of the body's upper extremity includes the wrist, palm, fingers, and the thumb i...

Q: What structures in the wall of the eye help control the amountof light entering the eye?

A: The eye is a sense organ that helps in the persistence of vision. The eyes are sensitive to light an...

Q: How many sperm are produced in meiosis from one primary spermatocyte? ______

A: There is a system of tiny tubes in the testicles. These tubes, called the seminiferous tubules, hous...

Q: Describe the process of implantation and placenta formation

A: Fertilization is the mechanism of fusion of sperm and an egg. This represents the first stage of sex...

Q: Define coelacanth

A: The coelacanth is a rare fish order that contains two living members of the genus Latimeria, which w...

Q: What is the source of each of the following in the urine, urea, Utica acid, and creatine?

A: 1. Urea is non-toxic and water-soluble. It is the major excretory product of protein catabolism. It ...

Q: What are interferons? How do they work?

A: Cytokines are types of small proteins that play a vital role in cell signaling. These peptides do no...

Q: Traditional treatments for osteoporosis address calcium deficiencies in the diet and the importance ...

A: Osteoporosis can be defined as a medical disorder in which bones become too brittle and weak. In the...

Q: Compare the functions of free ribosomes and ribosomesattached to the endoplasmic reticulum.

A: Ribosomes are known as the protein factories of the cell. They are small and round organelles,found ...

Q: Name the types of leukocytes and explain their functions

A: White blood cells (WBCs), also known as leukocytes or leucocytes, are immune system cells that help ...

Q: Summarize the characteristics of the disorders that affectthe upper and lower respiratory tracts

A: Respiratory tract is composed of the organs that participate in the process of breathing. The upper ...

Q: Compare and Contrast the 3 different muscle types in both form and function

A: Introduction: The soft tissue present in mammals is muscles. The muscle cells comprise protein filam...

Q: explain how B cells recognize and respond to an antigen;

A: The immune system is one of the most complex systems present in human beings. It is comparable to th...

Q: What are the classifications of sensory receptors according tomodality of stimulus? Give an anatomic...

A: All sensory receptors are biological transducers (any device that converts one form of energy to ano...

Q: Define active site

A: In biology, the enzymes can be described as the protein that acts as a biological catalyst for regul...

Q: If a person is complaining of pain that may indicate appendicitis, the pain would be located in thea...

A: Appendicitis refers to the inflammation of the appendix. It occurs due to obstruction of lumen of th...

Q: The skin of infants is more easily penetrated and injured by abrasionthan is the skin of adults. Bas...

A: The skin is made up of three skin layers in which epidermis is the outer most layer that provides pr...

Q: A series of people are found to have difficulty eliminating certain types of drugs from their bloods...

A: The mutation is an alteration in a DNA sequence. These can result from DNA copying mistakes made dur...

Q: List and explain the three ways that molecules and ionscan pass through the plasma membrane.

A: The internal composition of the cell  is maintained because the plasma is maintained because the pla...

Q: What are the five major nutrient categories?

A: The five major nutrients are : proteins , fats , carbohydrates  ( sugars , dietary fiber ) , vitamin...

Q: What is ATP?

A: ATP stands for adenosine triphosphate. It is the principal energy source in the body of an organism....