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ANA 209 Exam 2 Study Guide Questions with
Detailed Verified Answers
Question: three types of muscle
Ans✅ ✅: smooth, cardiac, skeletal
Question: skeletal muscle
Ans✅ ✅: -muscle that consists of striated (striped appearance) cell called muscle
fibers or myofibers.
-Striation is the result of overlapped arrangement of proteins.
-Produces voluntary movement by attaching to bone.
Question: cardiac muscle
Ans✅ ✅: -muscle that is found in the walls of the heart
-responsible for heart's contraction
-striated
-INvoluntary
-cells are called myocytes, cardiomyocytes, or cardiocytes.
-short, thick cardiocytes connected to each other through electrical and mechanical
junctions at their intercalated discs
-highly resistant to fatigue (abundance of myoglobin, glycogen, and large
mitochondria)
Question: smooth muscle
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Ans✅ ✅: -contractile proteins are not arranged in the same way as in other muscle
types
-myofilaments are not regularly aligned with each other, so NO striations
-calcium needed to activate contraction
-cells are capable of mitosis; have one nucleus
-cells are called myocytes and they are short and fusiform; tapered at ends
-INvoluntary
-contracts and relaxes slowly
-very fatigue-resistant
Question: Functions of muscular tissue
Ans✅ ✅: -movement (body parts, contents; communication)
-stability (maintain posture, resist pull of gravity)
-control of body openings and passages
-heat production (up to 85% of body heart; maintains homeostasis)
-glycemic control (regulate blood glucose; absorb, store and use glucose)
Question: Properties of muscle that enable them to carry out their
functions
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Ans✅ ✅: -excitability (react to stimuli)
-conductivity (move stimulation through muscle cell)
-contractility (shorten when stimulated)
-extensibility (stretch without harm)
-elasticity (can recoil from stretch)
Question: innervation
Ans✅ ✅: describes which nerve stimulates the muscle
Question: frontalis
Ans✅ ✅: facial muscle that elevates eyebrows and skin of forehead
Question: occipitalis
Ans✅ ✅: retracts and tenses the scalp
Question: galea aponeurotica
Ans✅ ✅: connects the frontalis and occipitalis; also known as the occipitofrontalis
Question: orbicularis oculi
Ans✅ ✅: facial muscle that closes eye
Question: orbicularis oris
Ans✅ ✅: facial muscle that closes lips
Question: zygomaticus major and minor
Ans✅ ✅: raise corners of mouth for smile
Question: risorius
ANA 209 Exam 2 Study Guide Questions with
Detailed Verified Answers
Question: three types of muscle
Ans✅ ✅: smooth, cardiac, skeletal
Question: skeletal muscle
Ans✅ ✅: -muscle that consists of striated (striped appearance) cell called muscle
fibers or myofibers.
-Striation is the result of overlapped arrangement of proteins.
-Produces voluntary movement by attaching to bone.
Question: cardiac muscle
Ans✅ ✅: -muscle that is found in the walls of the heart
-responsible for heart's contraction
-striated
-INvoluntary
-cells are called myocytes, cardiomyocytes, or cardiocytes.
-short, thick cardiocytes connected to each other through electrical and mechanical
junctions at their intercalated discs
-highly resistant to fatigue (abundance of myoglobin, glycogen, and large
mitochondria)
Question: smooth muscle
, Page | 2
Ans✅ ✅: -contractile proteins are not arranged in the same way as in other muscle
types
-myofilaments are not regularly aligned with each other, so NO striations
-calcium needed to activate contraction
-cells are capable of mitosis; have one nucleus
-cells are called myocytes and they are short and fusiform; tapered at ends
-INvoluntary
-contracts and relaxes slowly
-very fatigue-resistant
Question: Functions of muscular tissue
Ans✅ ✅: -movement (body parts, contents; communication)
-stability (maintain posture, resist pull of gravity)
-control of body openings and passages
-heat production (up to 85% of body heart; maintains homeostasis)
-glycemic control (regulate blood glucose; absorb, store and use glucose)
Question: Properties of muscle that enable them to carry out their
functions
, Page | 3
Ans✅ ✅: -excitability (react to stimuli)
-conductivity (move stimulation through muscle cell)
-contractility (shorten when stimulated)
-extensibility (stretch without harm)
-elasticity (can recoil from stretch)
Question: innervation
Ans✅ ✅: describes which nerve stimulates the muscle
Question: frontalis
Ans✅ ✅: facial muscle that elevates eyebrows and skin of forehead
Question: occipitalis
Ans✅ ✅: retracts and tenses the scalp
Question: galea aponeurotica
Ans✅ ✅: connects the frontalis and occipitalis; also known as the occipitofrontalis
Question: orbicularis oculi
Ans✅ ✅: facial muscle that closes eye
Question: orbicularis oris
Ans✅ ✅: facial muscle that closes lips
Question: zygomaticus major and minor
Ans✅ ✅: raise corners of mouth for smile
Question: risorius
