Physiology - 10 Easy Questions

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Kar
Kar, Assistant Professor (Biochemistry)
Karthikeyan Pethusamy is an assistant professor in the Department of Biochemistry at the All India Institute of Medical Sciences in New Delhi
Quizzes Created: 33 | Total Attempts: 50,715
| Attempts: 447 | Questions: 10
Please wait...
Question 1 / 10
0 %
0/100
Score 0/100
1. First physiological response to hyperhermia is

Explanation

The first physiological response to hyperthermia is vasodilation. This means that the blood vessels near the surface of the skin widen, allowing more blood flow to the skin. This helps in dissipating heat from the body to the environment. Vasodilation also causes the skin to appear red or flushed. Sweating and increased blood flow to the skin are additional responses that aid in cooling the body down. Thyroxin release and decreased heat production are not the initial responses to hyperthermia.

Submit
Please wait...
About This Quiz
Endocrine System Quizzes & Trivia

Physiology is quite an interesting subject, and it gives the reader a way of understanding the human body, its parts, and each of their respective functions. In preparation... see morefor your midterms, I have prepared ten physiology questions that are perfect for testing out your understanding. Think you can handle it? Then take it up and see just how high you score. see less

2. Enzyme that converts  androgen to oestrogen in the growing ovarian follicle is

Explanation

Aromatase is the enzyme that converts androgen to estrogen in the growing ovarian follicle. Androgens are male sex hormones, while estrogens are female sex hormones. Aromatase plays a crucial role in the synthesis of estrogen from androgens, which is necessary for the development and maturation of the ovarian follicle. This conversion is important for the regulation of the menstrual cycle and the production of female sex hormones.

Submit
3. Primary action of Inhibin is

Explanation

Inhibin is a hormone that plays a crucial role in regulating the reproductive system. Its primary action is to inhibit the secretion of FSH (follicle-stimulating hormone). FSH is responsible for the development of follicles in females and the production of sperm in males. By inhibiting FSH secretion, inhibin helps to regulate the balance of hormones involved in the reproductive cycle, ensuring proper functioning of the ovaries and testes. This inhibition of FSH secretion is essential for maintaining reproductive health and preventing excessive follicle development or sperm production.

Submit
4. Which inhibits osteoclasts ?

Explanation

Calcitonin inhibits osteoclasts. Osteoclasts are cells responsible for the breakdown and resorption of bone tissue. Calcitonin is a hormone produced by the thyroid gland that helps regulate calcium levels in the body. It works by decreasing the activity of osteoclasts, thereby reducing bone resorption. This ultimately helps to maintain bone density and prevent excessive bone loss.

Submit
5. B.P measured with sphygmomanometer is

Explanation

The correct answer is "intra arterial pressure." This is because a sphygmomanometer is a device used to measure blood pressure, specifically the pressure exerted on the walls of arteries. Intra arterial pressure refers to the pressure within the arteries themselves, which is what the sphygmomanometer is designed to measure.

Submit
6. Least useful physiological response to hypothermia in humans is

Explanation

Piloerection, also known as "goosebumps," is the least useful physiological response to hypothermia in humans. This response occurs when the muscles attached to hair follicles contract, causing the hair to stand on end. While piloerection may help in other animals by trapping a layer of air for insulation, it is not effective in humans due to our lack of dense body hair. Therefore, piloerection is not a significant mechanism for maintaining body temperature in humans during hypothermia.

Submit
7. Main site for HCO3 reabsorption in the kidney is

Explanation

The main site for HCO3 reabsorption in the kidney is the proximal convoluted tubule (PCT). The PCT is responsible for the reabsorption of the majority of filtered bicarbonate ions (HCO3-) from the glomerular filtrate back into the bloodstream. This reabsorption occurs through the action of carbonic anhydrase, which converts HCO3- into carbon dioxide (CO2) and water (H2O). The CO2 then diffuses into the PCT cells, where it is converted back into HCO3- and transported across the basolateral membrane into the bloodstream. Therefore, the PCT plays a crucial role in maintaining acid-base balance in the body by reabsorbing HCO3-.

Submit
8. Magnocellular pathway is involved in

Explanation

The magnocellular pathway is a visual pathway in the brain that is primarily responsible for processing motion information. It receives input from the retina and transmits signals related to the detection and perception of movement. Therefore, the involvement of the magnocellular pathway in the detection of movement makes it the correct answer.

Submit
9. Which of the following is absent in smooth muscle cells?  

Explanation

Smooth muscle is the least specialized type of muscle and contains no troponin. The contractile process is similar to the actin-myosin interactions that occur in motility of nonmuscle cells. In the smooth muscle cell, actin and myosin are attached to intermediate filaments at dense bodies in the sarcolemma and cytoplasm. Dense bodies contain alpha-actinin and, therefore, resemble the Z lines of skeletal muscle. Contraction causes cell shortening and a change in shape from elongate to globular. Contraction occurs by a sliding filament action analogous to the mechanism used by thick and thin filaments in striated muscle. The connections to the plasma membrane allow all the smooth muscle cells in the same region to act as a functional unit. Sarcoplasmic reticulum is not as well developed as that in the striated muscles. There are no T tubules present; however, endocytic vesicles called caveolae are believed to function in a fashion similar to the T tubule system of skeletal muscle.

When intracellular calcium levels increase, the calcium is bound to the calcium-binding protein calmodulin. Ca2+-calmodulin is required and is bound to myosin light chain kinase to form a Ca2+-calmodulin-kinase complex. This complex catalyzes the phosphorylation of one of the two myosin light chains on the myosin heads. This phosphorylation allows the binding of actin to myosin. A specific phosphatase dephosphorylates the myosin light chain, which returns the actin and myosin to the inactive, resting state. The actin-tropomyosin interactions are similar in smooth and skeletal muscle.

Smooth muscle cells (e.g., vascular smooth muscle cells) also differ from skeletal muscle cells in that they are capable of collagen, elastin, and proteoglycan synthesis, which is usually associated with fibroblasts.

Submit
10. Neuronal degeneration is NOT seen in

Explanation

Neuronal degeneration is the process of damage or death of neurons. Neuropraxia, on the other hand, is a type of nerve injury where the nerve is stretched or compressed, resulting in temporary loss of function. Unlike other conditions mentioned, neuropraxia does not involve degeneration or permanent damage to neurons. Therefore, it is the only option where neuronal degeneration is not seen.

Submit
View My Results

Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 06, 2012
    Quiz Created by
    Kar
Cancel
  • All
    All (10)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
First physiological response to hyperhermia is
Enzyme that converts  androgen to oestrogen in the growing...
Primary action of Inhibin is
Which inhibits osteoclasts ?
B.P measured with sphygmomanometer is
Least useful physiological response to hypothermia in humans is
Main site for HCO3 reabsorption in the kidney is
Magnocellular pathway is involved in
Which of the following is absent in smooth muscle cells?  
Neuronal degeneration is NOT seen in
Alert!

Advertisement