nervous system part 2 HW mylab
Which of the following is true about chemical synapses?
The axon of the sending neuron is very close to a dendrite of the receiving neuron. Neurotransmitters travel from the terminal end of the axon of the sending neuron to the receptors on the receiving axon's dendrites. The cleft is the tiny space between them.
If a drug blocks reuptake of a neurotransmitter, how will the neurons be affected?
The duration of the signal from the sending neuron will increase. Reuptake would normally remove neurotransmitter molecules from the synaptic cleft, ending the signal. Without reuptake, the signal is not "shut off." Understanding the function of chemical synapses will help you understand the function of many medications used to treat psychological conditions. Return to Assignment
Can you use the terms to complete this paragraph that summarizes the organization of the peripheral nervous system? Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
Your nervous system is organized into two broad anatomical divisions: the central nervous system (consisting of the brain and spinal cord) and the peripheral nervous system (PNS). Your PNS is further organized into two functional divisions. If you tap your knee, the signal to act is carried via your __motor system__ to the muscles in your knee. In contrast, the signals that pass via the __autonomic nervous system__ are involuntary and act primarily to regulate your body's internal environment. This involuntary nerve system is further organized into three divisions. If you need a sudden burst of energy, your __sympathetic division__ is activated to help you act quickly. In contrast, if you are relaxing and conserving energy, then it is your __parasympathetic division__ that is primarily in action.
Drag the labels from the left to the appropriate locations on the right to complete this concept map about vertebrate nervous systems.
a) Central nervous system b) Peripheral nervous system c) Brain d) Neurons e) Action potential f) Axons g) Synapses
The figure shows a synapse. Can you identify the structures and the processes that take place?
a. sending neuron b. receiving neuron c. vesicle containing neurotransmitter d. synaptic cleft e. action potential sent f. action potential triggers release of neurotransmitter g. neurotransmitter molecules bind to receptors h. neurotransmitter broken down
Drag the labels from the left onto the appropriate targets in the diagram on the right to describe the functions of the labeled brain structures. Not all labels will be used.
a. serves as sophisticated center of integration and control b. controls the left side of the body c. allows communication between cerebral hemispheres d. coordinates body movements e. controls basic sunctions like breathing and circulation f. conducts communication between brain and rest of body https://media.cheggcdn.com/media/ff2/ff20e377-79ec-44cc-979d-ecfc527505e3/phpAePaKs.png
The cerebrum develops from the _______________
forebrain
The ____________________ is the master control center for the endocrine system.
hypothalamus
A person who has a stroke that damages the cerebellum might have difficulty ____________
learning and coordinating motor movements
The brain stem consists of the ____________.
medulla oblongata, pons, and midbrain
The ________________ directs the flow of information between the cerebrum and brain stem.
thalamus
