584 Answered Questions for the topic physiology

05/29/19

What is the circulation that allows for nutrient absorption and excrete of metabolic wastes in humans?
Pulmonary veins carry oxygenated blood from lungs to heart, while pulmonary arteries carry deoxygenated/CO2 rich blood from heart to lungs. On the other hand, systemic arteries carry oxygen-rich... more
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05/24/19

How is sebum secretion regulated?
The principle of homeostasis in biology says that living organisms try to maintain some sort of equilibrium. Doing that requires the use of feedback mechanisms to regulate things like temperature,... more
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05/24/19

Why does the affinity of haemoglobin's for oxygen decrease at high altitudes?
My class 12 NCERT book says, Pg 226> The body compensates low oxygen availability by increasing red blood cell production, decreasing the binding affinity of haemoglobin and by increasing... more
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05/24/19

Why do mice have a higher metabolic rate than humans?
Mice and other small animals have higher metabolic rate than humans. How does that happen on cellular level, if we look on one cell in the mouse body?What is it in this cell that will be different?... more
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05/24/19

What is the physiological difference between cortisone and cortisol?
There is only hydrogen bond different. Cortisol is synthesized by our body, while cortisone is given to the patient. Why you cannot give cortisol directly to the patient?I think the reason is... more
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05/24/19

What determines whether a substance can diffuse across the blood-brain-barrier?
What determines whether a chemical substance is able to cross the blood-brain-barrier via passive, transmembrane diffusion? What structurally differentiates these chemicals?
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05/24/19

How do bile salts affect lipase activity?
**BACKGROUND**: It is well known that bile salts are needed for emulsification of fats. It is then said that this increases the surface area for activity of pancreatic lipase, implying that bile... more
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05/24/19

Why do the humans become sleepy after meals?
I don't know about all the mankind, but I know enough people, who becomes sleepy after their meals. Also, I'm not sure, what kind of food do they consume, but I personally get sleepy almost from... more
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05/24/19

What triggers meiosis in gonadal cells?
What specific biochemical processes are involved in inducing meiosis rather than mitosis? Why are gonadal cells the only cells in the human body which do undergo meiosis?
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Physiology Biology Nutrition

05/07/19

Does your metabolism slow down when you age?
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Physiology

05/07/19

What does it mean when the sacrolemma is depolarized?
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Physiology Anatomy

05/07/19

What is the study of physiology?
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05/07/19

Is there any use of CO₂ in human body?
We all know CO₂ as a waste product of metabolism . Does CO₂ have any helpful role , apart from having a role in pH of blood ?
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05/07/19

Why do mints make your mouth feel cold?
Why do mints make your mouth feel cold? And specifically, why does your mouth feel so cold if you eat a few mints and then drink a glass of cold water afterwards?
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Physiology

05/04/19

What are the three forms of passive transport?
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Physiology

05/04/19

Why do capillaries have thin walls?
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05/04/19

Why is the brain dependent on glucose?
The strict dependence of the (human) brain on glucose has always been puzzling to me. While ketones can substitute for a portion of the brain's energy needs, it cannot substitute completely: blood... more
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05/04/19

What physiological processes give rise to a linear cell survival curve?
If we plot the number of surviving cells in a structure over time (assuming no replacement), the shape of that curve should imply something about the underlying process responsible for cell death.... more
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Physiology

05/04/19

How many muscles are in the human body?
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Physiology

05/03/19

Is blood a mixture or a compound?
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Physiology

05/02/19

Cardiovascular Physiology: Cardiac Cycle Question
1) Which of the following does NOT occur shortly following the P wave? A. Atrial systoleB. The AV valves remain opened until isovolumetric contractionC. Heart sound 1 occursD. None of the above
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Physiology

05/02/19

Blood Fluids and Renal Physiology
The following set of questions pertains to the following case:A 25 year old male has just run 2 miles. Unfortunately, he left his water bottle on the toilet paper dispenser in one of the stalls of... more
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Physiology Biochemistry

05/02/19

Respiratory Physiology: Hemoglobin
A woman dumped a bucket of ice water over her head to raise global awareness about a neurological disease called amyotrophic lateral sclerosis, ALS. Which of the following correctly describes what... more
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05/02/19

What is the optimal time to implant embryo in uterus for in vitro fertilization?
What is the best time to implant an embryo in the uterus. I was under the impression that the earlier the better and more natural, but also if you wait until the blastocyst age, it may be better to... more
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Physiology

05/02/19

During respiration, gas exchange with the bloodstream takes place in the small sacs called _________________.
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