Question

5. A. Typically, the brain of a healthy, alert older person features __________ in comparison to the brain of a middle‑aged person:          

a. more neurons with decreased dendritic branching.

b. equal numbers of neurons with decreased dendritic branching.

c. fewer neurons and decreased dendritic branching.

d. fewer neurons and increased dendritic branching.

B. In general, the two hemispheres of the brain are specialized. The left hemisphere of the        brain emphasizes __________, while the right side of the brain emphasizes __________:

a. L=visual interpretation, locomotor control, homeostatic regulation;

            R=aesthetic analysis, emotional assessment, auditory processing.

b. L=analytical processing, linguistic activity, sequential analysis;

            R=visual interpretation, analytical procedures, tactile assessment.

c. L=sequential processing, analytical procedures, linguistic activity;

R=integrative activity, problem solving, emotional assessment.

d. L=auditory processing, linguistic productivity, sequential problem solving;

            R=sequential analysis, homeostasis, olfaction, and virtuousness.

C. In general, animals that are perceived by scientists as being relatively intelligent possess __________:

a. relatively large semantic memory capacities.

b. relatively large episodic memory capacities.

c. relatively large sensory memory capacities.

d. relatively well developed explicit memory performance.

e. humans.

Answer 1

5. b. equal numbers of neurons with decreased dendritic branching.

Studies has found out that there are as many new neurons in parts of the brain responsible for memory as younger people do. But what is different in the aging brain is the reduced blood flow to nourish these cells, age-induced cognitive deficits may not be due to neuronal loss or cell death, but rather may be due to change in the morophology of neurons, like change in the spine process of a neuron

B) b). L=analytical processing, linguistic activity, sequential analysis;

         R=visual interpretation, analytical procedures, tactile assessment.

Cerebrum: is composed of right and left hemispheres. It performs higher functions like interpreting touch, vision and hearing, as well as speech, reasoning, emotions, learning, and fine control of movement.

Not all functions of the hemispheres are shared. In general, the left hemisphere controls speech, comprehension, arithmetic, and writing. The right hemisphere controls creativity, spatial ability, artistic, and musical skills. The left hemisphere is dominant in hand use and language in about 92% of people. The right is dominant for visual imagery.

C) a). relatively large semantic memory capacities

Semantic memory is the most important part of human intellect, without it you may remember scores of words at length, but they all become of no meaning when you do not recognize their meaning and purpose.

Episodic memory, which refers to conscious memory for a particular event or episode in the past,

Explicit or declarative memory is the conscious recall of knowledge about people