The human brain

Question 1

Human brain

Answer 1

an extremely complex organ with different regions concerned with different functions. The main regions are:

• the cerebrum which is composed of two cerebral hemispheres
• the cerebellum
• the medulla

Question 2

The cerebrum is composed of two hemispheres

Answer 2

The cerebrum is divided into the left and right hemispheres by a deep longitudinal fissure; the two hemispheres remain in contact and communication with one another by the corpus callosum. Each hemisphere further subdivides into a frontal, parietal, occipital, and temporal lobe.

Question 3

posterior

Answer 3

towards the back of the body

Question 4

anterior

Answer 4

towards the front of the body

Question 5

frontal lobe

Answer 5

– concerned with conscious thought, problem solving, decision making, planning,
intelligence, emotions

Question 6

autonomic nervous system

Answer 6

The autonomic nervous system is a component of the peripheral nervous system that regulates involuntary physiologic processes including heart rate, blood pressure, respiration, digestion, and sexual arousal.

Question 7

medulla oblongata

Answer 7

1. posterior part of the brain and is continuous with the spinal cord
2. contains ventilation and cardiovascular centres
3. controls automatic actvities swallowing, coughing, salivation, peristalsis, heart beat, blood pressure
4. controlled by the ANS which presides over the body’s involuntary actions

Question 8

the differences between the autonomic and somatic nervous system

Answer 8

The somatic nervous system is involved with actions that are done consciously and signals are sent from the skin and muscles to the central nervous system and vice versa. (voluntary)

The autonomic nervous system controls the actions that are involuntary such as the function of organs and homeostasis. (involuntary)

Question 9

cerebellum

Answer 9

1. located just in front of the medulla
2. coordinates movement and controls balance and posture
3. responsible for precise moments especially those that have to be learnt
4. controls balance and coordination by working in conjuction with other parts of the brain. it integrates the motor impulses required to bring about the muscular response with sensory info from the eyes ear muscles balancing organs

Question 10

hypothalamus

Answer 10

controls sexual activity, feeding, drinking, sleeping, agression osmoregaulation (homeostasis, temp regulation)

Question 11

pituitary gland

Answer 11

considered the master hormonal galnd secretes a wide range of hormones
pea sized
lh fsh

Question 12

cerebrum or cerebral hemispheres

Answer 12

1. largest part of the brain
2. convoluted in structure
3. consists of grey and white matter
4. controls learning, memory, conscious actions, speech, personality

motor areas–transmit
impulses to skeletal muscles to control movement

sensory areas– receive impulses from receptors in the skin associated with sight and hearing

both via cranial and spinal nerves

association areas- sort out and integrates/stpres information before sending to relevant areas