Bio 256 Exam 3 Questions and Answers
Oxygen is transported by red blood cells it is carried by - Answer-chemically combined with a heme group
which of the following might trigger erythropoiesis? - Answer-hypoxia of EPO- producing
cells
which takes the longest time in a contracting skeletal myofiber ? - Answer-recovery
if acetylcholine is applied to the heart, but cardiac output is to remain constant, which of the following would have to happen? - Answer-stroke volume must increase
the myocardium requires ___ oxygen than skeletal muscle and has ___ mitochondria - Answer-more, more
freds blood was determined by AB positive. What does this mean? - Answer-There are no antibodies to A to B or to Rn antigens in the plasma
acute leukemia is more common in ___ persons; chronic leukemia is more common in ___ persons - Answer-younger, older
which will increase blood pressure? - Answer-adrenal medulla hormones, ADH hormone, angiostensis II, endothelium derived factors
which of the following is a regulatory function of blood? - Answer-maintenance of normal
pH in body tissues
an increase in venous return most directly affects - Answer-stroke volume
In an isotonic contraction, the muscle ________. - Answer-changes in length and moves the "load"
the neurotransmitter used at a motor end plate - Answer-acetylcholine
if plasma proteins are lost due to kidney disease, then which of the following pressure changes occur as a result? - Answer-blood colloid osmotic pressure decreases
the normal lymphocyte percentage of white blood cells is - Answer-about 25%
heart sounds other than those caused by closing of valves are called - Answer-murmurs
the most abundant plasma protein is - Answer-albumin
which of these is NOT a normal plasma protein - Answer-hemoglobin which of these is NOT a complication of aplastic anemia - Answer-hypertension
which of the following is likely during vigorous exercise - Answer-capillaries of the active
muscles will be engorged with blood
the velocity of blood flow - Answer-is slowest in the capillaries because the total cross sectional area is the greatest
which of the following factors does NOT influence heart rate? - Answer-skin color
a motor neuron and the myofibers it innervates is known as a - Answer-motor unit
which statement is true about an EKG - Answer-the t wave indicates ventricular depolarization
the molecule binding calcium in smooth muscle cells - Answer-calmodium
glucose delivered to a recovering myofiber is used to - Answer-reestablish glycogen stores
angina pectoris is - Answer-pain accompanying myocardial ischemia
rigor mortis occurs because - Answer-ATP required to detach myosin from actin molecules is depleted
Which returns fluid escaping from the circulatory system to the circulatory system? - Answer-lymphatic vesels
what ion is responsible for the depolarization of cardiac autorythmic cells during an action potential - Answer-calcium
Where is the pacemaker of the heart located? - Answer-right atrium
during a normal cardiac cycle, the atria contract when they are directly stimulated by the
- Answer-sinoatrial node
When old red blood cells are worn out, their components are recycled. The globin from the hemoglobin is - Answer-metabolized as amino acids
___ binds Ca++, exposing ___ binding sites on ___. - Answer-troponin, myosin, actin
The stimulus for atrial contraction originates at the ___, while the stimulus for ventricular
contraction originates at the ___. - Answer-sinoatrial node, atrioventricular node
Oxygen is transported by red blood cells it is carried by - Answer-chemically combined with a heme group
which of the following might trigger erythropoiesis? - Answer-hypoxia of EPO- producing
cells
which takes the longest time in a contracting skeletal myofiber ? - Answer-recovery
if acetylcholine is applied to the heart, but cardiac output is to remain constant, which of the following would have to happen? - Answer-stroke volume must increase
the myocardium requires ___ oxygen than skeletal muscle and has ___ mitochondria - Answer-more, more
freds blood was determined by AB positive. What does this mean? - Answer-There are no antibodies to A to B or to Rn antigens in the plasma
acute leukemia is more common in ___ persons; chronic leukemia is more common in ___ persons - Answer-younger, older
which will increase blood pressure? - Answer-adrenal medulla hormones, ADH hormone, angiostensis II, endothelium derived factors
which of the following is a regulatory function of blood? - Answer-maintenance of normal
pH in body tissues
an increase in venous return most directly affects - Answer-stroke volume
In an isotonic contraction, the muscle ________. - Answer-changes in length and moves the "load"
the neurotransmitter used at a motor end plate - Answer-acetylcholine
if plasma proteins are lost due to kidney disease, then which of the following pressure changes occur as a result? - Answer-blood colloid osmotic pressure decreases
the normal lymphocyte percentage of white blood cells is - Answer-about 25%
heart sounds other than those caused by closing of valves are called - Answer-murmurs
the most abundant plasma protein is - Answer-albumin
which of these is NOT a normal plasma protein - Answer-hemoglobin which of these is NOT a complication of aplastic anemia - Answer-hypertension
which of the following is likely during vigorous exercise - Answer-capillaries of the active
muscles will be engorged with blood
the velocity of blood flow - Answer-is slowest in the capillaries because the total cross sectional area is the greatest
which of the following factors does NOT influence heart rate? - Answer-skin color
a motor neuron and the myofibers it innervates is known as a - Answer-motor unit
which statement is true about an EKG - Answer-the t wave indicates ventricular depolarization
the molecule binding calcium in smooth muscle cells - Answer-calmodium
glucose delivered to a recovering myofiber is used to - Answer-reestablish glycogen stores
angina pectoris is - Answer-pain accompanying myocardial ischemia
rigor mortis occurs because - Answer-ATP required to detach myosin from actin molecules is depleted
Which returns fluid escaping from the circulatory system to the circulatory system? - Answer-lymphatic vesels
what ion is responsible for the depolarization of cardiac autorythmic cells during an action potential - Answer-calcium
Where is the pacemaker of the heart located? - Answer-right atrium
during a normal cardiac cycle, the atria contract when they are directly stimulated by the
- Answer-sinoatrial node
When old red blood cells are worn out, their components are recycled. The globin from the hemoglobin is - Answer-metabolized as amino acids
___ binds Ca++, exposing ___ binding sites on ___. - Answer-troponin, myosin, actin
The stimulus for atrial contraction originates at the ___, while the stimulus for ventricular
contraction originates at the ___. - Answer-sinoatrial node, atrioventricular node
