BIOS 252 LATEST 2026 TEST PAPER 1 QUESTIONS AND
ANSWERS GRADED A+
✔✔inferior oblique - ✔✔elevates eye and turns it laterally
✔✔Levatator Palpebrae - ✔✔Opens Eye for Winking,Blinking,Squinting
✔✔Sternocleidoma stoid - ✔✔flexes neck; rotates head
✔✔rectus abdominis - ✔✔flexes vertebral column
✔✔Diaphragm - ✔✔Large, flat muscle at the bottom of the chest cavity that helps with
breathing
✔✔external intercostals - ✔✔elevates ribs during inspiration
✔✔internal intercostals - ✔✔depresses ribs during forced expiration
✔✔lattismus dorsi - ✔✔extension, adduction, internal rotation of shoulder
✔✔trapezius - ✔✔Elevates, depresses, retracts, and rotates the scapula; rotates the
arm
✔✔Supraspinatus - ✔✔Abducts arm; stabilizes the head of the humerus in glenoid
cavity; one of the "rotator cuff" muscles
✔✔rectus femoris - ✔✔extends leg and flexes thigh
✔✔biceps femoris - ✔✔extends thigh and flexes leg
✔✔gastrocnemius - ✔✔Calf muscle, plantar flexion
✔✔bipennate - ✔✔Fibers on both sides of tendon
✔✔triangular muscles - ✔✔flat and fan-shaped, with fibers radiating from a narrow
attachment at one end to a broad attachment at the other
✔✔Paralell muscles - ✔✔
✔✔multipennate - ✔✔tendon branches within muscle
✔✔fusiform - ✔✔spindle shaped
, ✔✔circular muscle - ✔✔muscle that forms a ring around a body opening
✔✔sensory (afferent) neurons - ✔✔transmit impulses toward the CNS
✔✔Interneurons - ✔✔Central nervous system neurons that internally communicate and
intervene between the sensory inputs and motor outputs
✔✔motor (efferent) neurons - ✔✔neurons that carry outgoing information from the brain
and spinal cord to the muscles and glands
✔✔CNS (central nervous system) - ✔✔brain and spinal cord
✔✔PNS (peripheral nervous system) - ✔✔the sensory and motor neurons that connect
the CNS to the rest of the body
✔✔Roles of meninges - ✔✔Cover and protect the CNS. Protect blood vessels and
enclose venous sinuses. Contain cerebrospinal fluid and form partitions in the skull.
✔✔role of cerebrospinal fluid - ✔✔primarily provides shock absorption
✔✔Meninges - ✔✔three protective membranes that surround the brain and spinal cord
✔✔dura mater - ✔✔thick, outermost layer of the meninges surrounding and protecting
the brain and spinal cord
✔✔arachnoid mater - ✔✔weblike middle layer of the three meninges
✔✔pia mater - ✔✔thin, delicate inner membrane of the meninges
✔✔CSF functions - ✔✔buoyancy, protection, chemical stability
✔✔Dendrites - ✔✔Branchlike parts of a neuron that are specialized to receive
information.
✔✔Soma function - ✔✔synthesizes a large quantity and variety of proteins used as
neurotransmitters
✔✔axon hillock function - ✔✔Allows impulses to move away from the cell
✔✔nodes of ranvier function - ✔✔facilitate the rapid conduction of nerve impulses
✔✔myelin sheath function - ✔✔Protect and electrically insulate the axon
Increase speed of nerve impulse transmission
ANSWERS GRADED A+
✔✔inferior oblique - ✔✔elevates eye and turns it laterally
✔✔Levatator Palpebrae - ✔✔Opens Eye for Winking,Blinking,Squinting
✔✔Sternocleidoma stoid - ✔✔flexes neck; rotates head
✔✔rectus abdominis - ✔✔flexes vertebral column
✔✔Diaphragm - ✔✔Large, flat muscle at the bottom of the chest cavity that helps with
breathing
✔✔external intercostals - ✔✔elevates ribs during inspiration
✔✔internal intercostals - ✔✔depresses ribs during forced expiration
✔✔lattismus dorsi - ✔✔extension, adduction, internal rotation of shoulder
✔✔trapezius - ✔✔Elevates, depresses, retracts, and rotates the scapula; rotates the
arm
✔✔Supraspinatus - ✔✔Abducts arm; stabilizes the head of the humerus in glenoid
cavity; one of the "rotator cuff" muscles
✔✔rectus femoris - ✔✔extends leg and flexes thigh
✔✔biceps femoris - ✔✔extends thigh and flexes leg
✔✔gastrocnemius - ✔✔Calf muscle, plantar flexion
✔✔bipennate - ✔✔Fibers on both sides of tendon
✔✔triangular muscles - ✔✔flat and fan-shaped, with fibers radiating from a narrow
attachment at one end to a broad attachment at the other
✔✔Paralell muscles - ✔✔
✔✔multipennate - ✔✔tendon branches within muscle
✔✔fusiform - ✔✔spindle shaped
, ✔✔circular muscle - ✔✔muscle that forms a ring around a body opening
✔✔sensory (afferent) neurons - ✔✔transmit impulses toward the CNS
✔✔Interneurons - ✔✔Central nervous system neurons that internally communicate and
intervene between the sensory inputs and motor outputs
✔✔motor (efferent) neurons - ✔✔neurons that carry outgoing information from the brain
and spinal cord to the muscles and glands
✔✔CNS (central nervous system) - ✔✔brain and spinal cord
✔✔PNS (peripheral nervous system) - ✔✔the sensory and motor neurons that connect
the CNS to the rest of the body
✔✔Roles of meninges - ✔✔Cover and protect the CNS. Protect blood vessels and
enclose venous sinuses. Contain cerebrospinal fluid and form partitions in the skull.
✔✔role of cerebrospinal fluid - ✔✔primarily provides shock absorption
✔✔Meninges - ✔✔three protective membranes that surround the brain and spinal cord
✔✔dura mater - ✔✔thick, outermost layer of the meninges surrounding and protecting
the brain and spinal cord
✔✔arachnoid mater - ✔✔weblike middle layer of the three meninges
✔✔pia mater - ✔✔thin, delicate inner membrane of the meninges
✔✔CSF functions - ✔✔buoyancy, protection, chemical stability
✔✔Dendrites - ✔✔Branchlike parts of a neuron that are specialized to receive
information.
✔✔Soma function - ✔✔synthesizes a large quantity and variety of proteins used as
neurotransmitters
✔✔axon hillock function - ✔✔Allows impulses to move away from the cell
✔✔nodes of ranvier function - ✔✔facilitate the rapid conduction of nerve impulses
✔✔myelin sheath function - ✔✔Protect and electrically insulate the axon
Increase speed of nerve impulse transmission
