Question Pack 1 Flashcards
Na+ reabsorption is of utmost importance to the function of the ____.
Loop of Henle
Does the sodium pump directly cause action potentials.
While some Na+ movement does occur down the length of the axon during the action potential (it occurs in the nodes of Ranvier, which are unmyelinated), this movement does not depend on the sodium pump nor does it cause action potentials
Somatic Cells
Any Cell that is not a reproductive cells
Germ Cells
Reproductive (sex) cells
leukocytes gravitate towards ____.
inflammation
Inflammation (Define)
your body’s process of fighting against things that harm it, such as infections, injuries, and toxins, in an attempt to heal itself
The most effective method for producing an increase in the total amount of water lost through the skin during a certain period would be
Raising temperature
What recombinant processes depends on the F factor plasmid?
Conjugation
Inflation of the lungs in mammals is accomplished by
Negative Pumping Pressure Action (a pressure that is lower than atmospheric pressure )
Which of the following nucleotide sequences describes an antisense molecule that can hybridize with the mRNA sequence 5′-CGAUAC-3′?
3’gcuaug5’
Hypoxia
Caused by insufficient blood hemoglobin concentration to supply oxygen for exercise at the low oxygen pressure found at high altitudes
What characteristics clearly marks fungi as a eukaryote?
Mitochondria
Is a ribosome a membrane bound organelle?
No
Inbreeding can reduce the fitness of a population in the short term because it causes an increase in the:
Incidence of expression of deleterious recessive traits. Not spontaneous mutations
Autosome
Any chromosome that is not a sex chromosome.
Aldosterone stimulates Na+ reabsorption by the kidneys. What changes in blood volume and pressure would be expected as a result of aldosterone deficiency?
The question asks the examinee to determine the result of an aldosterone deficiency on blood volume and blood pressure, given that aldosterone stimulates Na+ reabsorption in the kidney. An aldosterone deficiency would result in lower Na+ reabsorption into the bloodstream. Because H2O passively follows Na+ during reabsorption in the kidney, less Na+ reabsorption would result in less H2O reabsorption into the bloodstream. This would result in decreased blood volume. Blood volume would also be affected by lower blood Na+ levels because there would be less of this ion to osmotically hold water in the extracellular fluid. Decreased blood volume would result in decreased blood pressure as well (D).
The sequence of events in the human menstrual cycle involves close interaction among which organs?
Neither the thyroid gland nor the adrenal glands are particularly involved in the menstrual cycle. The hypothalamus exerts control over the pituitary hormones involved in menstruation by secreting hormone-releasing factors into the pituitary portal circulation. The gonadotropic hormones FSH and LH produced by the pituitary and the ovarian hormones estrogen and progesterone all have a role in regulating the human menstrual cycle. Therefore, close interaction among the hypothalamus, the pituitary, and the ovary is necessary for the human menstrual cycle.
A double-stranded DNA molecule contains bases with a ratio of (A + T)/(G + C) = 3:1. This molecule is replicated with DNA polymerase in the presence of the four deoxynucleoside triphosphates with a molar ratio of (A + T)/(G + C) = 1:1. What is the expected ratio of (A + T)/(G + C) in the double-stranded daughter DNA molecule?
The double stranded daughter DNA molecule would be an exact duplicate of the parent molecule. It would have the same (A + T)/(G + C) ratio. The correct answer is therefore 3:1,
What type or class of chemical messenger traveling in the blood would most probably link the brain with the digestive tract and fat cells in the control of body weight?
Hormones
Lutenizing Hormone
Hormone that triggers ovulation
Vasodilation ____ blood flow.
Increases
Vasoconstriction ____ blood flow.
decreases
