if you want an accounting of your worth, count your friends. merry browne unit 6 day 8
TRANSCRIPT
If you want an accounting of your worth, count your friends.
Merry Browne
Unit 6 Day 8
This week:
Monday—work on objectives related to senses
Tuesday—vision and the eye dissection Wednesday—complete objectives Thursday—ear disorders and review Friday-- test
Today’s Agenda
Revisit reflex arc (see diagram) Objectives 10-15 Practice 10-15 Objectives 16-18 Cranial Nerves WS
Objective 11 Cerebral cortex
Objective 12 Cerebellum—motor coordination
Objective 13 Meninges: - pia mater, dura mater,
arachnoid– physical protection for brain and spine.
Cerebrospinal fluid-watery-shock-absorbing fluid surrounding the brain and spine.
Blood-brain barrier-capillaries impermeable to many substances. This protects the brain and spine from infection.
Objective 14Concusion—head
injury causing reversible damage.
Contusion—head injury causing irreversible damage.
Anterior grey horn
Spinal nerve
Central canal
Posterior grey horn
White matter
Obj. 15
Dorsal rootVentral root
Dorsal ganglion
Obj. 11-15 Practice: Find the error
1. Meninges are found in the brain, spinal cord, and all nerves.
2. The cerebrospoinal fluid cushions sinovial joints.
3. Bacteria frequently pass through the blood brain barrier.
4. Contusions are reversible head injuries.
Matching1. Cerebrum2. Cerebellum3. Medulla
Oblongata4. Hypothalamus5. Corpus
Callosum
A. Connects right and left side of brain.
B. Visceral homeostasis
C. Speech, reasoning, thought
D. Motor coordination
E. Survival functions
Obj. 16 Peripheral Nervous System Definition: the peripheral nervous
system is responsible for sensory and motor output.
Components: composed of all the neurons outside the central nervous system. Divided into 2 main categories; sensory division and motor division
Obj. 17 Types of Nerves
Sensory – only sensory fibers
Motor – only motor fibersMixed – both sensory &
motor fibers
Obj. 18 Cranial Nerves
See fig. 13.1 diagram
Today’s Agenda
Review the parts of the eye Obj. 19—plexus Obj. 20-23 Practice sympathetic/parasympathetic Taste –obj. 24 Hearing Obj. 27, 28, 29
Objective 19
Plexus----see diagram
Obj. 20 Reflexes
Distinguish between autonomic and somatic reflexes
Autonomic reflexes involve the involuntary muscles such as muscles of the heart and intestinal tract. Ex. Pupil dilation
Somatic reflexes involves skeletal muscles. For example: gag reflex, patellar reflex
Objective 22: Sympathetic/parasympathetic
Sympathetic system prepares the body for fight or flight
Parasympathetic prepares the body for rest and digestion.
Obj. 23 Effects of parasympathetic systems
Heart Bronchioles Digestive tract Bladder Iris of eye Blood vessels of skeletal muscles Blood vessels of visceral muscles Penis
Obj. 23 Effects of Sympathetic systems
Heart Bronchioles Digestive tract Bladder Iris of eye Blood vessels of skeletal muscles Blood vessels of visceral muscles Penis
Obj. 24 Taste
Four taste sensations are available:
Sweet
Sour
Bitter
Salty