Which of the following best describes a bipolar neuron? multiple axons and one dendrite one axon that splits into two processes one axon and one dendrite one axon and multiple, highly branched dendrites
Why is the outside of a neuron positively charged? because chloride ions gather around the outside of the cell membrane because calcium ions gather around the outside of the cell membrane because sodium ions gather around the outside of the cell membrane because potassium ions gather around the inside of the cell membrane because sodium ions gather around the inside of the cell membrane
Fill in the Blank Question The mitotic phase during which spindle fibers attach to chromosomes is called square blank Need help? Review these concept resources.
The best definition of an antigenis. , a chemical that always combines with anthodies. a chemical that can eficitan anthody respire. a foreign substance. a pathogen.
Question 15 The blood in this circulation path would always be- oxygenated or deoxygenated? (1 point) A oxygenated B deoxygenated Question 16
In the cladistic classification system, tarsiers belong to the suborder of Haplorhines. True False
Define carrying capacity The carrying capacity of a population is Multiple Choice the maximum growth rate exhibited by a population during the exponential growth phase. the difference bet between the population's birthrate and deathrate. the maximum number of individuals that an environment can support. the minimum number of individuals required to ensure that a population survives.
Based on genetic analysis of living primates calibrated by the fossil record it is estimated that apes and Old World monkeys diverged into separate lineages around 25 million years ago. True False
The molecular clock has been useful to determine the phylogenetic relationships of species based on the assumption that DNA is preserved unchanged over long periods of time. True False
Question 4 (Mandatory)(2.5 points) An example of natural selection is: A) Two of these answers are correct. B) The matching of the genetic diversity of a population with the environment. C) a randon change in allele frequencies within a population D) nonrandom mating. E) the random movement of genes from one population to another.
Which of the following types of cells is most responsible for responding to color? Rods Ganglion cells Bipolar cells Cones Optic nerve
Select the correct statement regarding chemical synapses. Neurotransmitter receptors are located on the axons terminals of cells. The synaptic cleft uses the action potential to transmit a chemical signal to the postsynaptic cell. Cells with gap junctions use chemical synapses. The release of neurotransmitter molecules gives cells the property of being electrically coupled.
The __ is a capillary network that produces a blood filtrate that enters the urinary tubules. glomerulus vasa recta interlobar capillary peritubular capillary
Movement of sodium ions into the muscle cell at the neuromuscular junction causes __ A. Repolarization of the muscle cell membrane B. Depolarization of the muscle cell membrane C. Re-uptake of acetylcholine D. Release of acetylcholine
The neurotransmitters dopamine and serotonin are associated with which emotion? fear joy anger
The movement of molecules and ions from the peritubular capillaries into interstitial fluid and then into the nephron tubule iscalled __ a. secretion b. reabsorption c. excretion d. filtration
B lymphocytes are directly responsible for cell-mediated immunity. Select one: True False
In the sequence of events for inspiration, what step happens immediately after contraction of the inspiratory muscles? Air flows into the lungs Intrapulmonary volume increases Thoracic cavity volume increases Intrapulmonary pressure decreases IDONT KNOWYET
Multiple Choice Question Select the statements that best describes the relationship between genes and chromosomes. Genes are variations of chromosomes and can change the structure of the protein product. Genes are composed of long strands of DNA organized into chromosomes. Chromosomes are composed of long strands of DNA organized into chunks called genes. Chromosomes break down to form genes during meiosis so that the genes can be easily separated during gamete formation.
Which cells secrete parathyroid hormone in the parathyroid gland? Hematopoietic cells Chief cells Parietal cells Follicular cells
