The liver and skeletal muscles have a high storage of:
Answer : A
Explanation:
The liver and skeletal muscles are two of the major glycogen storage sites. The liver contains a high amount in order to regulate blood sugar levels. The skeletal muscles contain a high amount of glycogen in order to satisfy their energy demands.
What is the predominant source of progesterone after ovulation?
Answer : D
Explanation:
Recall that the luteal phase of the menstrual cycle occurs after ovulation which occurs after the follicular phase. Progesterone saturation is highest during the luteal phase, and the corpus luteum is most responsible for this increased amount. The oocyte is an egg, which isnג€™t responsible for progesterone. The ovary is a source of progesterone, but not the primary source. And the corpus callosum is the point of juncture between the hemispheres of the brain.
Which of the following is necessary for the penetration of an egg?
Answer : C
Explanation:
In order to penetrate an egg, a spermatozoon must bind with the exterior of the egg. This binding takes place by way of the acrosome reaction, in which the sperm penetrates the jelly coat of the egg to breach and fuse with the egg plasma membrane before releasing its constituents into the eggs cytoplasm.
Which is the most inferior structure?
Answer : B
Explanation:
Inferior refers to the area nearest the feet. Its opposite is superior, which refers to the area nearest the top of the head. In this case, the stomach is superior to both the pancreas and the small intestine which are both superior to the sigmoid colon. The sigmoid colon is nearest the feet of the options.
Which hormone is released after a meal high in carbohydrates?
Answer : A
Explanation:
When the blood stream is over saturated with glucose (as a result of a meal high in carbohydrates), the pancreas releases insulin in order to regulate the glucose levels in the blood.
Which of the following does NOT happen during inflammation?
Answer : D
Explanation:
Inflammation causes dilation, not constriction of blood vessels. This dilation of blood vessels is designed to increase permeability across the blood vessels and facilitate mobility of white blood cells and other phages.
Which of the following is NOT a result of sympathetic stimulation?
Answer : B
Explanation:
Sympathetic stimulation, associated with the fight-or-flight response, results in an increased blood pressure to help the body deal with a stressful situation. The body diverts blood away from digestion and the digestive system in favor of the skin, the muscles, and the brain.
A virus contains all of the following except?
Answer : A
Explanation:
A virus is neither eukaryotic nor prokaryotic, but similar to prokaryotes, viruses lack organelles. They are composed primarily of nucleic acids, DNA and RNA, and proteins. Viruses lack mitochondria.
Which of the following most recently evolved to its present state?
Answer : B
Explanation:
The medulla oblongata and the pons make up the brain stem, which evolved earliest. The cerebellum evolved next, followed by the cerebrum.
The oxidation of NADH occurs in which of the following?
Answer : C
Explanation:
NADH is the reduced form of nicotinamide adenine dinucleotide and contains an electron that can be donated in the ETC. In the ETC, NADH is oxidized to NAD+.
Why does the lactic acid pathway predominate in anaerobic respiration?
Answer : D
Explanation:
Lactic acid fermentation, a method of anaerobic respiration, is relied upon to generate energy for cells in the absence of oxygen. However, because oxygen acts as the primary electron acceptor in aerobic respiration, the lactic acid pathway, lacking oxygen, contains no electron acceptor in the process.
Which pathway accounts for the least amount of ATP generated (by the pathway)?
Answer : B
Explanation:
The generation of most to least ATP is as follows: ETC, which can produce 32 ATP; Glycolysis, which produces 2 ATP, and the TCA cycle, which produces 2 GTP in addition to electron carriers that are used in the ETC to generate ATP.
An action potential would travel fastest in:
Answer : B
Explanation:
Axons are thin or thick bundles of nerve fibers. The thicker an axon is, the more quickly an action potential will travel through it. Additionally, a myelin sheath functions as an insulator that also facilitates the rapid transmission of an action potential.
Where is the ETC located in bacteria?
Answer : D
Explanation:
Eukaryotes house the ETC in their mitochondria, but bacteria, which are prokaryotic, do not possess mitochondria or organelles. The ETC in prokaryotic bacteria is located along the cell membrane.
Which of the following is NOT made by the pituitary gland?
Answer : B
Explanation:
The list of hormones made by the pituitary gland can be recalled with the mnemonic FLATPOG, signifying: FSH, LH, ACTH, TSH, GH, MSH (melanocyte stimulating hormone), and prolactin. ADH is made by the hypothalamus and is only secreted by the posterior pituitary.
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