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Portage Learning: A&P 1 Module 5 - Muscular System
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Portage Learning: A&P 1 Module 5 - Muscular System Name the 3 types of muscle tissue skeletal, cardiac, smooth skeletal muscle have blood & nervous supply to provide movement under conscious control What does it mean that skeletal muscles are under conscious control? meaning that a person ca...

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  • March 29, 2023
  • 25
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers

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  • portage learning aampp 1 module 5 muscular system

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Portage Learning: A&P 1 Module 5 -
Muscular System
Name the 3 types of muscle tissue

skeletal, cardiac, smooth

skeletal muscle

have blood & nervous supply to provide movement under conscious control

What does it mean that skeletal muscles are under conscious control?

meaning that a person can consciously decide to use these muscles to complete an action

Communication to coordinate movement starts where?

In the brain with a message sent through the spinal cord & eventually attaches to a muscle

What is included in the central nervous system?

brain and spinal cord

The CNS (brain and spinal cord) connect to?

peripheral nervous system

What do peripheral nerves do

carry signal from CNS (brain+spinal cord) to muscle to enable movement

peripheral nerves

carry signal from CNS (brain+spinal cord) to muscle to enable movement

examples of peripheral nerves

spinal nerves (cervical, thoracic, and lumbar), the upper trunk of the brachial plexus, and the radial
nerve.

Motor action

(CNS to Muscle) Message from CNS to a muscle is called motor actions

Sensory Input (sensation)

(Environment to nerves to CNS) Information sent from external environment by nerves to the central
nervous system

Central Nervous System (brain & spinal cord) connect to

Peripheral Nervous system

,Examples of peripheral nerves

1. spinal nerves (lumbar, thoracic, cervical)
2. Upper trunk of the brachial plexus
3. Radial nerve

Peripheral Nervous System (PNS)

Carries information into and out of the CNS
- carry communication from CNS to muscle AND carry info from environment to CNS

describe the difference between tendons and ligaments

tendons are connective tissue that attaches muscle to bone at the end.

Ligaments are connective tissue that connect bone to bone. Helping to stabilize joints where bone
meets.

Tendons

connective tissue that connects muscle to bone

Origin vs insertion of a muscle

Origin is a fixed stationary point; insertion is the place that is moved during a muscle contraction

origin

muscles attach to non movable bone

insertion

muscles attach to movable bone

Muscle action

effect produced by a muscle contraction
- named for action they produce, e.g., flexor or extensor
- i.e. tricep is the primary extensor of the forearm

Innervation

a peripheral nerve that supplies muscle with a message from brain

describe muscle action and innervation?

Action of muscle is what effect is produced by the muscle's contraction

The innervation is the peripheral nerve that supplies a muscle with the message from the brain.

How many total cranial nerves

12

, Where do cranial nerves originate and control?

On the ventral surface of brain
&
controll muscles function of several organs & glands

MUSCLES OF FACIAL EXPRESSION

...

List all the muscles of the facial expression: (8)

BOOM - ZRFT

1. Obicularis Oculi
2. Obicularis Oris
3. Zygomaticus major/minor
4. Risorius
5. Frontalis (occipitofrontailis)
6. Buccinator
7. Masseter
8. Temporalis

Orbicularis Oculi

close eye; facial nerve CN VII




Orbicularis Oris

closes mouth, protrudes lips, presses lips to teeth; facial nerve CN VII




Zygomaticus Major

Action: pulls corners of lips upward
Innervation: facial nerve CN VII
Inferior to zygomaticus minor
(cheek bone)

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