Only certain organisms possess gene variants that are able to exchange Na+ for K+, thus making the Na+/K+ ATPase unique to
A) Animals.
B) Fungi.
C) Plants and animals.
D) Fungi and plants.
Answer: A
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Skeletal muscle contraction will continue to occur as long as the following chemicals are available in the cytosol of the muscle fiber
a) ATP and acetylcholine (ACh) b) calcium ions and ATP c) ACh and potassium ions d) sodium ions and ATP e) calcium and ACh
Oxytocin and ADH are produced in the posterior pituitary
Indicate whether the statement is true or false
In the stratum granulosum of the skin, keratinocytes are filled with basophilic keratohyaline granules. These granules form as a result of which intracellular process?
a. Accumulation of hyaluronic acid b. Degeneration of mitochondria c. Formation of aggregations of profilaggrin d. Fragmentation of the nucleus during keratinocyte apoptosis e. Synthesis of hemidesmosomes
What gland lies at the base of the brain and secretes hormones that regulate the function of many other glands in the body?
A. Thyroid B. Adrenal C. Pituitary D. Thalamus