Crowdly

At its natural length

At any length, maximum force is only dependent on the number of motor units recruited

At its longest length

Completely independent of its length

________ is used in firewalls that use various types of examination methods as a second type of protection.

Well-known port numbers range from ________.

A ________ is made by a firewall.

When a firewall examines a packet passing through it, it will drop the packet if it is ________.

a stateful packet

a provable attack packet

not a provable attack packet

a suspicious packet

The strength of contraction of skeletal muscle:

never reaches its potential maximum because of the attachment of the muscles to the bones of the skeleton.

is determined mainly by the myosin ATPase activity of the muscle.

is normally graded by both recruitment of motor units and variations in action potential frequency.

is graded mainly by varying the amount of Ca²⁺ released per action potential.

Direction of induced emf in a circuit is in accordance with law of

conservation of momentum

conservation of energy

conservation of charge

conservation of mass

Binding of _________ to __________ permits cross-bridge _____________ between actin and myosin.

Ca²⁺; tropomyosin; attachment

Ca²⁺; actin; rotation

ATP; myosin; rotation

ATP; myosin; detachment

In the regulation (turning on and off) of contraction in smooth muscle

the activity of myosin light chain kinase increases when there is an increase in the amount of calcium bound to calmodulin.

myosin must first phosphorylate actin before the crossbridges can attach.

myosin phosphatase has to be inactivated for relaxation to occur.

phosphorylation of myosin causes the crossbridges to detach and, therefore, allows the muscle to relax.

calmodulin must bind to tropomyosin to allow the actin to split ATP in the crossbridge cycle.

The active length-force relation of skeletal muscle is characterised by an optimal length (L_O) at which:

the width of the I band in the sarcomeres is at a minimum.

the thin filaments from either end of the sarcomere are overlapping each other.

a fully fused tetanic contraction produces maximum force.

summation is no longer effective and twitch contractions are sufficient to give maximum force.